The board takes power from a USB port and the light can be turned on / off with the on board switch. It is also available in a white version. This kit contains: 1 x USB power cable, 1m 1 x right angle power switch 1 x colour changing (rainbow) LED 1 x zero ohm resistor 1 x USB lamp PCB PCB dimensions: 44mm x 16.5mm. Physical characteristics: PCB Length: 44mm. PCB Width: 16mm. PCB Component Count: https://elecena.pl/product/16395878/colour-changing-usb-lamp-kit 2020-04-06 https://elecena.pl/product/16395878/colour-changing-usb-lamp-kit 2020-09-01 https://elecena.pl/product/16395878/colour-changing-usb-lamp-kit 2021-03-02 https://elecena.pl/product/16395878/colour-changing-usb-lamp-kit 2025-07-09